# 289

## 289 is an odd composite number. It is composed of a single prime number multiplied by itself.

What does the number 289 look like?

This visualization shows the relationship between its 1 prime factors (large circles) and 3 divisors.

289 is an odd composite number. It has a total of three divisors.

## Prime factorization of 289:

### 172

(17 × 17)

See below for interesting mathematical facts about the number 289 from the Numbermatics database.

### Names of 289

• Cardinal: 289 can be written as Two hundred eighty-nine.

### Scientific notation

• Scientific notation: 2.89 × 102

### Factors of 289

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 17

### Divisors of 289

• Number of divisors d(n): 3
• Complete list of divisors:
• Sum of all divisors σ(n): 307
• Sum of proper divisors (its aliquot sum) s(n): 18
• 289 is a deficient number, because the sum of its proper divisors (18) is less than itself. Its deficiency is 271

### Bases of 289

• Binary: 1001000012
• Base-36: 81

### Squares and roots of 289

• 289 squared (2892) is 83521
• 289 cubed (2893) is 24137569
• 289 is a perfect square number. Its square root is 17
• The cube root of 289 is 6.6114890183

### Scales and comparisons

How big is 289?
• 289 seconds is equal to 4 minutes, 49 seconds.
• To count from 1 to 289 would take you about two minutes.

This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 289 cubic inches would be around 0.6 feet tall.

### Recreational maths with 289

• 289 backwards is 982
• The number of decimal digits it has is: 3
• The sum of 289's digits is 19
• More coming soon!